Holley HP modification for timed vacuum port?

Hi everyone, I just got a 850cfm Holley HP carb for my 440. I was wondering if there is a way to make the carb have timed vacuum advanced as there is not one single port on the carb? Or should I lock the timing out? What im running is a stock low compression 440 with a HP cam.
Thanks in advanced!

You can take it off the metering block if you know where to look and what to do.

You can buy a new base plate with a timed vacuum port. They aren't super expensive.

What do you have the initial and total timing adjusted to now without the vacuum advance? I always use manifold vacuum with great success.